Treatment of a landfill leachate from Casablanca city by a coagulation-flocculation and adsorption process using a palm bark powder (PBP)

Chaouki, Zineb; Hadri, Mohamed El; Nawdali, Mostafa; Benzina, Mourad; Zaitan, Hicham

doi:10.1016/j.sciaf.2021.e00721

Cited by 32 publications

(12 citation statements)

References 43 publications

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“…In the experiments, maximum values of 0.19 NTU and 100 mg O 2 /L were achieved for simultaneous turbidity and BOD 5 removal, respectively, using ferric chloride. These outcomes were in agreement with the finding of Chaouki et al (2021), who used ferric chloride for the removal of pollutants from landfill leachate. The experimental results demonstrated that the coagulation process reduced the color by 80%, the turbidity by 90%, the COD by 50%, and BOD 5 by 99% when 12 g Fe 3+ /L was applied as the optimum dose.…”

Section: Coagulation-flocculationsupporting

confidence: 92%

Recent technologies for leachate treatment: a review

Cherni

Elleuch

Messaoud

et al. 2021

Euro-Mediterr J Environ Integr

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Municipal solid waste leachate, a kind of wastewater, can severely damage the environment and contaminate the groundwater because of its high organic matter and toxic heavy metal concentrations. Due to its complex composition, this wastewater must be properly treated prior to being discharged into the environment. In recent decades, several biological approaches (e.g., bioremediation, phytoremediation, and bioreactors) and physicochemical processes (e.g., coagulation/flocculation, air stripping, and advanced oxidation processes) have proven effective at removing the organic load and the toxicity of this effluent. Physicochemical treatments have been applied as pretreatment or post-treatment steps for biological processes, but these methods do not always provide satisfactory results and can cause secondary pollution in some cases. In addition, owing to the high concentrations of organic matter, ammonia, and trace metals in landfill leachate, combined approaches to leachate treatment have been reported to be efficient. This article highlights the advantages and drawbacks of these approaches to the treatment of leachate by providing an updated overview of the various methods that have been successfully applied in this field. Further studies should focus on improving landfill leachate treatment to maximize removal performance.

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Section: Coagulation-flocculationsupporting

confidence: 92%

Recent technologies for leachate treatment: a review

Cherni

Elleuch

Messaoud

et al. 2021

Euro-Mediterr J Environ Integr

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“…In addition, the OH-group is also related to OH from cellulose, hemicelluloses, and lignin (see chemical composition section). The nature of water sorption to different chemical composition of materials has always been a complex matter due to hydrogen-bond formation to all sorbing sites, which can be considered for adsorption of water to the different material Chaouki et al (2021).…”

Section: Water Adsorption Isothermsmentioning

confidence: 99%

Natural cellulosic material characteristics: A possibility to develop antimicrobial active fiber-based packaging

Parichanon

Matan

Limbo

et al. 2021

BioRes

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Coconut husk, rubberwood sawdust, and palm leaf base are cellulosic agricultural wastes that have potential to be processed to fiber as absorbing material. This study investigated characteristics (morphological, physiological properties, chemical composition, absorption capacity, and water absorption isotherms) of coconut, rubberwood, and palm fiber. Also, the study aimed to develop an antimicrobial sachet packaging to resist against foodborne pathogens (Listeria monocytogenes, Staphylococcus aureus, Salmonella spp., and Escherichia coli) by adding lime oil (LO) emulsion or Litsea cubeba (LC) oil at 50 to 700 µL into the material (1 g) before, and then dried and placed in the 1-L seal box. Results showed that among the three, coconut performed the best in terms of releasing the essential oil (EO) emulsion against bacteria. Coconut could adsorb and release volatile LO or LC at the lowest concentrations (LO, 500 µL/L; LC, 300 µL/L) to inhibit bacteria compared with the other fibers (700 µL/L) at 35 °C. Results indicated that coconut has a low water absorption rate, which influenced the faster adsorption of EO emulsion in the beginning of the process; therefore, using low concentrations of EO in coconut for bacterial inhibition is possible. Coconut contains 34.5% lignin, 68.7% holocellulose, 37.6% cellulose, and 31.2% hemicellulose. Coconut is suitable as an alternative to the biocomposite material in developing a new antimicrobial packaging design.

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“…reported that combined coagulation-flocculation and adsorption processes could be a useful option for the treatment of solid-waste landfill leachate. [ 45 ] Hurairah et al . reported the combination of struvite precipitation and coagulation-flocculation method results in a percentage of removal of COD 48.6%, NH3-N 92.8%, and color 98.8%.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of chemical oxygen demand and color removal from leachate using coagulation/flocculation combined with advanced oxidation process

et al. 2022

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Background: One of the basic practices in the field of waste management is the collection and treatment of leachate. Leachate from municipal waste due to high chemical oxygen demand (COD) and dark color is a potential pollutant of the environment, which causes a lot of problems in the absence of treatment and direct discharge to the environment. This study aimed to determine the efficiency of ultrasonic process in combination with coagulation and flocculation process using sodium ferrate in COD and color reduction. Materials and Methods: In this experimental study, all experiments were performed in batch conditions and with changing process variables such as pH and sonication time, and the effect of three parameters, including ultrasonic reaction time (15, 30, and 45 min), pH (2, 4, 5/5, and 7), and coagulant dosage (from 1 to 150 g/l) on the COD reduction and color removal, was evaluated. Coagulant concentration and then the removal efficiency of COD and color were analyzed by ANOVA using SPSS 18. Results: The COD reduction and color removal were 87.05% and 88.6% in optimal condition (using 120 g/L of sodium ferrate at pH 5.5), with coagulation/flocculation, after ultrasound (15 min). Ultrasound (15 min) + sodium ferrate (without coagulation/flocculation) achieved 46.25% of COD reduction and 90.35% of color elimination, whereas the ultrasonic process alone allowed removing the COD and color in the leachate by less than 50%. Conclusion: The results indicate that C–F followed by ultrasonic can be used to efficiently reduce the organic matter and color from municipal waste leachate, and it would be an ideal option for leachate treatment.

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Treatment of a landfill leachate from Casablanca city by a coagulation-flocculation and adsorption process using a palm bark powder (PBP)

Cited by 32 publications

References 43 publications

Recent technologies for leachate treatment: a review

Recent technologies for leachate treatment: a review

Natural cellulosic material characteristics: A possibility to develop antimicrobial active fiber-based packaging

Evaluation of chemical oxygen demand and color removal from leachate using coagulation/flocculation combined with advanced oxidation process

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